We read 4 results from City of Chino Hills’s 2024 water quality report. No results over a legal limit or above a health goal.
Serves about 76,414 people · Water system ID CA3610036 · Read the district’s 2024 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
Results from the 2024 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Copper90th percentile of 30 homes tested, 0 over the action level · sampled 2025 · Customer taps · 2024 report, page 3 | 0.24 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 18 · sampled 2025 · Chino Hills distribution · 2024 report, page 3 | 8 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range ND to 84 · sampled 2025 · Chino Hills distribution · 2024 report, page 3 | 51 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of 30 homes tested, 2 over the action level · sampled 2025 · Customer taps · 2024 report, page 3 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
What you can do
Nothing in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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